Mastodawn

"The Blob" is a pioneering experimental setup in which a perfect, stationary ball of turbulence is generated at the center of a water tank by firing synchronized water jets. This configuration isolates the chaotic swirling of fluids from boundary interactions, allowing scientists to study turbulence in its purest, undisturbed form.
#ExperimentalPhysics #FluidDynamics #TheoreticalPhysics #Physics #sflorg
https://www.sflorg.com/2026/04/phy04132601.html

A ‘blob’ in a tank is helping scientists tease out the secrets of turbulence

A novel experiment at UChicago reveals fundamental laws governing swirling fluids

Education & Knowledge Apr 5

Why It's Almost Impossible To Store Antimatter

https://tube.blueben.net/w/j95zPNGUhxu1iXUjiqJi2p

Why It's Almost Impossible To Store Antimatter

PeerTube

FundamentalTime Mar 26

New preprint submitted to Classical and Quantum Gravity:

GR is time-symmetric. That symmetry is the root of singularities, information loss, and the arrow of time.

We propose the opposite: irreversibility is fundamental.

Main result: gravitational collapse halts before any trapped surface forms. C_max < 1. No quantum gravity needed.

📎 https://doi.org/10.5281/zenodo.19240251

#GeneralRelativity #ArrowOfTime #TheoreticalPhysics

Entropic I‑Field Theory: Fundamental Irreversibility and the Resolution of Singularities, Information Loss, and the Arrow of Time

General relativity is time-symmetric. This symmetry is the root of its three deepest puzzles: singularities, information loss, and the arrow of time. All existing approaches treat irreversibility as emergent — a statistical mirage atop a reversible microreality. We propose the opposite. Irreversibility is fundamental. It is encoded in a classical scalar field $I$ — the I-field — that couples universally to gravity and matter. Its dynamics are governed by an Euler-Lagrange-Rayleigh action, where a dissipation term $\gamma u^\mu \nabla_\mu I$ breaks time-reversal symmetry at the level of the field equation. The modified Einstein equations introduce a dimensionless stabilization index $\eta$ that quantifies I-field backreaction. The consequences are direct: - Gravitational collapse halts at a finite critical density $\rho_c$, before a trapped surface can form. The maximal compactness satisfies $\mathcal{C}_{\max} < 1$. - No event horizon ever appears — information remains causally accessible throughout the evolution. - The arrow of time emerges from the field dynamics, not from boundary conditions or statistical postulates. Three foundational problems are thus resolved within a single classical framework, from first principles, without invoking quantum gravity.

Zenodo

terrorist :: Feline Mar 24

Just discovered a hep-th article on #arXiv that is very likely AI-generated.
The items in bibliography are basically made-up.

https://arxiv.org/abs/2602.15714

#Physics #AI #LLM #TheoreticalPhysics #BHThermodynamics

Thermodynamic Topology of 4D Charged AdS Black Holes with $F^{αβ}F^{γλ}R_{αγβλ}$ Coupling

We investigate the thermodynamic phase transitions of a four-dimensional charged anti-de Sitter black hole endowed with a non-minimal coupling of the form $F^{αβ}F^{γλ}R_{αγβλ}$. Using perturbative methods, we derive a consistent black hole solution and analyze its thermodynamics through both conventional equilibrium techniques and a topological defect classification approach. The system displays van der Waals-like critical behavior, with a swallow-tail structure in the free energy and distinct phase branches. The topological analysis independently confirms the existence of critical points and classifies the system within the universal topological scheme for black hole thermodynamics.

arXiv.org

Rakovskyi Dmytro Mar 22

As an independent theorist, I've developed CCDR and jneopallium (biological neuron network modeling). Two preprints ready for gr-qc/hep-th.
Need arXiv endorsement — happy to share PDFs for review.
Links: https://github.com/rakovpublic/CCDR
DM open!
#TheoreticalPhysics #QuantumGravity

GitHub - rakovpublic/CCDR: cosmology theory

cosmology theory. Contribute to rakovpublic/CCDR development by creating an account on GitHub.

GitHub

Show thread

katch wreck Mar 11

#theoreticalPhysics #quantumMechanics #decoherence #wavefunction #wavefunctionCollapse #measurement #mathematicalPhysics #functionalAnalysis #equation

jobRxiv Mar 5

Postdoctoral Researcher in Gravity-Quantum Interface at Kyushu University
Kyushu University

See the full job description on jobRxiv: https://jobrxiv.org/job/kyushu-university-27778-postdoctoral-researcher-in-gravity-quantum-interface-at-kyushu-university/

#AMOphysics #quantuminformation #theoreticalphysics #ScienceJobs #hiring #research
https://jobrxiv.org/job/kyushu-university-27778-postdoctoral-researcher-in-gravity-quantum-interface-at-kyushu-university/?fsp_sid=10057

Postdoctoral Researcher in Gravity-Quantum Interface at Kyushu University

Post a job in 3min, or find thousands of job offers like this one at jobRxiv!

jobRxiv

Hacker News Mar 5

Extending single-minus amplitudes to gravitons

https://openai.com/index/extending-single-minus-amplitudes-to-gravitons/

#HackerNews #ExtendingSingleMinusAmplitudes #Gravitons #QuantumPhysics #TheoreticalPhysics #Research #ScienceNews

Extending single-minus amplitudes to gravitons

A new preprint extends single-minus amplitudes to gravitons, with GPT-5.2 Pro helping derive and verify nonzero graviton tree amplitudes in quantum gravity.